Wrench.



im MLM) mmm, 1912,

APPLIOAT CIK .stem

ZE'EBEGH, @3F SAN FRANCISCO, CALIFORNIA., ASSGNOR TG CHARLES Gl 0F SAN RANCISCO, CALIFORNA.

WRENCH.

Application sied. Haren is, i912.

270 e'ZZ whom t muy concern Be il; irnovvn that ll, AXEL W. nmnisoiv, a Citizen 'oli the United States, residing al San Francisco, in the 'county of San Franeisee and Stute of California, have invented new and useful improvements in llrenohes, of which the following is n specification.

'The obje-et of the present invention is to provide n nut or pipe Wrench which can be quickly, easily anduocurately adjusted into the proper posit/ion for operation, sind, when adjusted, ivill notl slip out el' position.

In' the accompanying drawings, Figure l is n broken side view I" the Wrench; Fig. 2 is n perspective View of a clamp plate used. thereon; Fig. 3 is a similar view of e Wedge used therein; 4 is a view similar to' l of e modified form of the invention. Referring to the drawing, l indicates the shank ol" he wrench, having thereon the lined jew 2 and the movable jaw 3, the latter formed with collars i surrounding the shenl; and hblding said movable jew thereto, Seid movable jaw is formed with en engurecess 8 to receive a clamp pluie 9 and wedge 14. Seid clamp plate 9 is angular in form, having a portion' lO thereof extending parallel to the shank and formed with transverse eorrugetions 1l adapted to engage similar eorrugations l2 in the adjoiningn face of the shank l. lt is also formed with e right-angled extension 13 through which is screwed n threaded portion l of a 22 extendingr through an aperture 7 in the inner wall 6 of said movable jaw 3, which forms the inner Wall of said recess 8. Said stein hns secured thereon a milled head Q7 enabling it to he conveniently turned, said heed being connected to said stern 22 by a eonoidal portion 2S serving to space the heed from the rear wall 6. A coiled spring isuinterposed betweenl the Wall 6 and t'lie angular portion lol" the ffice plate. The J:

orvvurd end of the i5 is formed with :i rounded knob l5 which is received Within u transverse groove l? formed in said wedge7 said knob reduced top i9 of said groove preve; ting rlierlinob being, withdrawn therefrom. The oblique fece of the ,vedge e gages an inne-r obue fric-e 5 of the jew which ornis ithe obl recess 8.

Wrench constructed een the movable jaw 3 having n contracted noch 18 en'-V iqne Ymoll of the i Specification of Letters Patent.

'of such movement being te compr 'with the lingers und, Withdrawn i l l l Talente@ lieb. ll CTS, Serial No. 684.733.

pushed toxvurd the slutiounrv janv line spring 2l iii the elunip alrite is beek by reason oli' the engugeiuenr eorrugol'ions ll with the corrugulions said compressed spring noting, however, advance the clump pluie und wedge liu' as permitted by the angular 'front'. portion of the recess 8,

When pressure on the movable jew toward the iixed jow is removed7 the spring' nots to push the movable jaw buck but ve-rv slightly7 if :it ull, the inuxiuuun extent et' suon backward movement being the width of a eorrugat-ion 1l, or l), und the movable jaw is securely held in this position, because any backward pressure on 'the movable jow, being transmitted through the tapering Wedge, luis the elleet only to press the eorrul gutions ll still more firmly into enga gemein; with the oorrug rions l2.

.in orderlo vvithluw the move-bl from the fixed jow, the houd un the rear Wall or the lingers :ire pressed tween said head and the rear inoJ or" wall (i, und the wedge und clump plate are withdrawn against the pressure of the spring 2l into a wider portion of the recess S, theoorrugetious ll slipping inst the eurrugntions lil hen the movable jaw is moved tower-d the fixed jung. it is held against buolwurd movement, :is before described, only hy the engagement of the eorrugutions .il vvilzli the corrugations l2, und it is therefore obvious that when moved into Certain positions, it

may be possible for it to iuove bseliward to4 the extent of nearly the width of u eorriignu tion. .in suoli euse, il' it be desired to @uur the movable jaw to ,Fitv lightly upon the article 'to be clamped, this muy be e looted I turning the head Q7, which has the elleet ol advancing the wedge lffl und :ilse the iuov able jliv: 3 relatively lo the clump nlale ln the modification shown iu stond of nizrliing the wedge und elfuui i in two selmride pieces, they ure nuiflu iu piece, as shown ui, 3l). toch-ed thereto, wliieh Y operi ure 'l' in the wull 5, und L coiled spring l is iiile-riuised nl projecting through. said 'wail 6, .and it l il E formed with a crown cam or screw 33 which engages a stud 34: projecting laterally 'from said stem. It will be eeen that by turning to' the left the head 32 upon the stem 31, the Wedge 30 Will be Withdrawn from. the corrugations on the shank. On turning the head 32 to the right, the spring 21 will act to move the Wedge 30 into engagement with the corrugations 1n the shank.

I claim:-

LHA Wrench comprising a shank one side of which has' transverse corrugations, a fixed jaw, a movable jaw having an angular recess, Wedging means in. said recess having transverse corrngations for engaging the oorrugations in the shank, a spring in said recess arranged to press said Wedging means into the angle of Jche recess, a stem projecting rearwardly through said movable jaw, and a head on said stem, saidlrstem being rovided with meansV whereby? when said ead is turned, said movable jaw is moved recess arranged fo press said W into the angle of the recess, a stem propecia nominee relatively to the cor-ragni? Wedging means.

2. A Wrench Comprising a .el nk ene side of which has transverse serrage ions, jaw, a movable jaw .lhavidg`l an angular recess, Wedgng means in said recess having transverse corru 'ations for engaging; the corrugations in t e' shank, a spring insaid ing means ing rearwardly through said movable jaw, the projecting portion of said lo., g; provided with means whereby said movable jaw may be moved relatively to the corn., gated part of said Wedgingg means.

In testimony whereof l hav" heir my hand in the presence of two snhi Witnesses.

D. B. Rrcnanns.. 

